Here's the canned response regarding putting vBShout in a custom location:
To put vBShout in a custom location, do the following:
Step 1: AdminCP -> DBTech - vBShout-> Instance Management -> [Edit].
Step 2: Change the
Auto-Display Shoutbox setting to
Disabled.
Step 3: Write down the the
Varname setting. For the default shoutbox, it's
instance1. The rest of this guide will assume you replace
instance1 with the actual
Varname if it is different.
Step 4: Enter the Style Manager and add
either {vb:raw show.vbshout_instance1} (vB4)
or {$show[vbshout_instance1]} (vB3) to the templates you wish the shoutbox to appear in.
Follow these steps as described and you will have total control over the position of the Shoutbox.
Please note that some locations may not work as intended on vBulletin 3.8, and also note that it is not designed to go in the Forum Blocks side-bar (vBulletin 4).
Beyond that, I can't go into specifics for how to deploy it in an iframe as that would most likely require a custom solution that we're unable to provide as a part of our normal support service, sorry